handoff docs (#624)

Author: arthurchi93

fern/docs.yml

@@ -181,6 +181,10 @@ navigation:
               - page: Custom tools troubleshooting
                 path: tools/custom-tools-troubleshooting.mdx
                 icon: fa-light fa-wrench
+              - page: Handoff tool
+                path: tools/handoff.mdx
+                icon: fa-light fa-hand-holding-hand
+                hidden: true
               - section: External tools
                 icon: fa-light fa-cubes
                 contents: